The turn of the new century saw World Superbikes enter a period of change. For so long, the rules had been simple and effective: it was pretty much twins versus fours, Italy versus Japan.
From the start of the series in 1988, World Superbikes saw 750cc four-cylinder machines, ostensibly manufactured in Japan, in the form of Kawasaki’s GPX, ZXR and ZX-7R 750s, Honda’s VFR750RR RC30 and later RC45s, Suzuki’s GSX-R750 and Yamaha’s FZR750, OW-01 and later YZF750 take on Ducati’s booming twins, notably their 851, 888, 916, 955 and 996/998cc bikes.
So well-tuned were the rules that only tweaks were really required. Initially the rules limited four-cylinder motors to 750cc with a 165 kilo weight limit. The twin could go to 1000cc and – initially at least – a weight…